Which statement is true about sealed ball bearings in wheel hubs?

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Multiple Choice

Which statement is true about sealed ball bearings in wheel hubs?

Sealed wheel hub bearings are designed as a complete, pre-lubricated unit with factory-set clearance that isn’t adjusted in service. Because the bearing assembly comes already set, there’s no adjustment procedure specified for these hubs. If the bearing shows wear or roughness, the recommended fix is to replace the hub/bearing unit rather than trying to adjust it. Regular lubrication intervals aren’t required for sealed bearings because the lubricant is sealed in for the life of the unit. The grease seal’s role is to keep contaminants out and retain lubrication, not to set or change clearance. Shim adjustments aren’t used with these sealed hub assemblies, since their clearance is fixed by design.

Sealed wheel hub bearings are designed as a complete, pre-lubricated unit with factory-set clearance that isn’t adjusted in service. Because the bearing assembly comes already set, there’s no adjustment procedure specified for these hubs. If the bearing shows wear or roughness, the recommended fix is to replace the hub/bearing unit rather than trying to adjust it.

Regular lubrication intervals aren’t required for sealed bearings because the lubricant is sealed in for the life of the unit. The grease seal’s role is to keep contaminants out and retain lubrication, not to set or change clearance. Shim adjustments aren’t used with these sealed hub assemblies, since their clearance is fixed by design.

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